Imported Upstream version 2.16.0

[lilypond.git] / lily / unpure-pure-container.cc

diff --git a/lily/unpure-pure-container.cc b/lily/unpure-pure-container.cc
new file mode 100644 (file)
index 0000000..2caba12
--- /dev/null
+++ b/lily/unpure-pure-container.cc
@@ -0,0 +1,110 @@
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 2011--2012 Mike Solomon <mike@apollinemike.com>
+
+
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "unpure-pure-container.hh"
+
+#include "grob.hh"
+
+static scm_t_bits unpure_pure_container_tag;
+
+bool
+is_unpure_pure_container (SCM s)
+{
+  return (SCM_NIMP (s) && SCM_CELL_TYPE (s) == unpure_pure_container_tag);
+}
+
+SCM
+unpure_pure_container_unpure_part (SCM smob)
+{
+  LY_ASSERT_TYPE (is_unpure_pure_container, smob, 1);
+  return (SCM) SCM_CELL_WORD_1 (smob);
+}
+
+SCM
+unpure_pure_container_pure_part (SCM smob)
+{
+  LY_ASSERT_TYPE (is_unpure_pure_container, smob, 1);
+  return (SCM) SCM_CELL_WORD_2 (smob);
+}
+
+LY_DEFINE (ly_unpure_pure_container_p, "ly:unpure-pure-container?",
+           1, 0, 0, (SCM clos),
+           "Is @var{clos} an unpure pure container?")
+{
+  return scm_from_bool (is_unpure_pure_container (clos));
+}
+
+LY_DEFINE (ly_make_unpure_pure_container, "ly:make-unpure-pure-container",
+           1, 1, 0, (SCM unpure, SCM pure),
+           "Make an unpure-pure container.  @var{unpure} should be an unpure"
+           " expression, and @var{pure} should be a pure expression.  If @var{pure}"
+           " is ommitted, the value of @var{unpure} will be used twice.")
+{
+  SCM z;
+
+  if (pure == SCM_UNDEFINED)
+    pure = unpure;
+
+  SCM_NEWSMOB2 (z, unpure_pure_container_tag, SCM_UNPACK (unpure), SCM_UNPACK (pure));
+  return z;
+}
+
+LY_DEFINE (ly_unpure_pure_container_unpure_part, "ly:unpure-pure-container-unpure-part",
+           1, 0, 0, (SCM pc),
+           "Return the unpure part of @var{pc}.")
+{
+  LY_ASSERT_TYPE (is_unpure_pure_container, pc, 1);
+  return unpure_pure_container_unpure_part (pc);
+}
+
+LY_DEFINE (ly_unpure_pure_container_pure_part, "ly:unpure-pure-container-pure-part",
+           1, 0, 0, (SCM pc),
+           "Return the pure part of @var{pc}.")
+{
+  LY_ASSERT_TYPE (is_unpure_pure_container, pc, 1);
+  return unpure_pure_container_pure_part (pc);
+}
+
+int
+print_unpure_pure_container (SCM s, SCM port, scm_print_state *)
+{
+  scm_puts ("#<unpure-pure-container ", port);
+  scm_display (unpure_pure_container_unpure_part (s), port);
+  scm_puts (" ", port);
+  scm_display (unpure_pure_container_pure_part (s), port);
+  scm_puts (" >", port);
+  return 1;
+}
+
+SCM
+pure_mark (SCM pure)
+{
+  scm_gc_mark (unpure_pure_container_unpure_part (pure));
+  scm_gc_mark (unpure_pure_container_pure_part (pure));
+  return pure;
+}
+
+void init_unpure_pure_container ()
+{
+  unpure_pure_container_tag = scm_make_smob_type ("unpure-pure-container", 0);
+  scm_set_smob_mark (unpure_pure_container_tag, pure_mark);
+  scm_set_smob_print (unpure_pure_container_tag, print_unpure_pure_container);
+};
+
+ADD_SCM_INIT_FUNC (unpure_pure_container, init_unpure_pure_container);